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Tue, 11 Aug 2026 10:48:56 -0500 From: James Lin To: CC: Harry Wentland , Leo Li , Aurabindo Pillai , Roman Li , Wayne Lin , Tom Chung , "Fangzhi Zuo" , Dan Wheeler , Ray Wu , Ivan Lipski , Alex Hung , James Lin , Chenyu Chen , Wenjing Liu , Alvin Lee , James Lin Subject: [PATCH 06/24] drm/amd/display: Guard against empty DCN6 UTM QoS table Date: Tue, 11 Aug 2026 05:28:40 +0800 Message-ID: <20260810213010.1703162-7-PingLei.Lin@amd.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260810213010.1703162-1-PingLei.Lin@amd.com> References: <20260810213010.1703162-1-PingLei.Lin@amd.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CH2PEPF0000013E:EE_|BL3PR12MB6522:EE_ X-MS-Office365-Filtering-Correlation-Id: 8bf42765-5568-4be0-1687-08def7c014e0 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; ARA:13230040|23010399003|1800799024|82310400026|36860700016|376014|56012099006|10067099003|11063799006|3023799007|22082099003|18002099003; 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DIR:OUT; SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: CEoGlDXPUTmO8oCvh0XIGT2gFt2BN38mO6NaG7IXyQWd1SyzN67JezXcg+UndXkyN3FNIFU+znOV+pPiVVaTZzlxRlATYmoBbMfimITLFafv211uI0/EM9ZEQsaRjBBvwsknZMBs4+0Jiqt2HE3vyQHhcc0n20D5pOEdbSp8arLk+3tUiXVm9XnsMlS57LM34qgoAPW6iJg2WwXY+/RChD8mIP1Mr0OdEnZd+SfLV45H7ExH6PboB6o2K59hMLF4DbsyyEdMxejxtOYhayCuOd9YnNF87aAvhSjb+5DmCKDStKdw3gI3KBajHHppcOwDaBhXzBFr2dOW5+3O+Bk2OX2U0zFm0SJLTHvYb0yLxbFJtK2wxVdLMmuFN/0m/glrS3lW2domZ8/N0kE/udT3aq+DQxKhOSD1XETW8AcmNdub2G9pa6ugLholc9ZpHaxG X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 11 Aug 2026 15:49:08.8927 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 8bf42765-5568-4be0-1687-08def7c014e0 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d; Ip=[165.204.84.17]; Helo=[satlexmb08.amd.com] X-MS-Exchange-CrossTenant-AuthSource: CH2PEPF0000013E.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BL3PR12MB6522 X-BeenThere: amd-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Discussion list for AMD gfx List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: amd-gfx-bounces@lists.freedesktop.org Sender: "amd-gfx" From: Wenjing Liu [Why] The UTM QoS model population indexed into a firmware-provided table without checking whether it reported any load levels or SOPs, leaving a malformed table treated as valid instead of absent. [How] Bail out early and clear the output model pointer when the load level count or SOP count is zero. Reviewed-by: Alvin Lee Signed-off-by: Wenjing Liu Signed-off-by: James Lin --- drivers/gpu/drm/amd/display/dc/clk_mgr/dcn60/dcn60_clk_mgr.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn60/dcn60_clk_mgr.c b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn60/dcn60_clk_mgr.c index 40e975e8a550..218856c5fe09 100644 --- a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn60/dcn60_clk_mgr.c +++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn60/dcn60_clk_mgr.c @@ -625,6 +625,11 @@ static void dcn60_populate_utm_qos_model( const SocUtmTable_t *utm_table = &init_table->UtmTable; unsigned int ll, sop; + if (utm_table->Header.LoadLevelCount == 0 || utm_table->Header.SopCount == 0) { + *qos_model = NULL; + return; + } + memset(dchub, 0, sizeof(*dchub)); dchub->load_level_count = (uint8_t)utm_table->Header.LoadLevelCount; dchub->sop_count = (uint8_t)utm_table->Header.SopCount; -- 2.43.0